# How do you graph the line y = 4?

Jun 30, 2018

See below.

#### Explanation:

When graphing $y = 4$, you know the $y$ value is $4$, so you draw a dot at $\left(0 , 4\right)$, but if you recall from class, if it a single variable, like $y = 4$, it goes horizontally, i.e. parallel to the $y$-axis as shown below:

Jun 30, 2018

Horizontal line at $y = 4$

#### Explanation:

In slope-intercept form, this equation can be written as

$y = 0 x + 4$, where our slope is zero and $y$-intercept is at $4$.

The only kind of line with a slope of zero is a horizontal line- the only values this equation takes on is when $y = 4$; it doesn't matter what $x$ is.

We will just have a horizontal line at $y = 4$.

graph{y=0x+4 [-9.96, 10.04, -3.08, 6.92]}

Hope this helps!